Electric cooker.



M. L. KEAGY.

ELECTRIC COOKER.

APPLICATION FILED APR.11. 1913.

Patented 001.2711914.

s SHEETS-SHEET 1.

WITNESSES:

M. L. KEAGY.

ELECTRIC GOKBR.

APPLICATION FILED A1=R.11,A 1913.

Patented Oct. 27, 19.14.

3 SHEETS-SHEET 2.

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/NVEN TOI? Jzz'/z BY 11 TTURNEY Wl TNE SSE S:

M. L. KEAG'Y.

ELECTRIC COOKER.

APPLICATION FILED APR. 11, 1913.

Patented Oct. 27, 1914.

3 SHEETS-SHEET 3.

WITNESSES:

.gl/@fl N By m l TTUHNEY UNITED STATES PATENT OFFICE. i

MARTIN L. KEAGY, 0F CANTON, OHIO.

ELECTRIC COOKER.

Specification of Letters Patent.

Patented Oct. 27. 1914.

lTo all whom' it may cfmcem:

Be it known that I, MAn'rIN L.,KEAGY, a citizen of the United States,residing at Canton, county of Stark, and State of Ohio, haveinventedcertain new and useful Improvements in Electric Cookers, of which thefollowin is a specification.

My invention relatesto electric cook stoves and particularly tosmallportable stoves of the class-mentioned.

The object of my invention is to provide "a small portable electriccooker that shall l.generate a great amount of heat and so con- Structedthat the portions of the device with which the hands are liable to comein contact shall be kept cool.

A further object of my invention is to provide a device of the classmentioned adapted to be supported by a table and used in a mannersimilar to a chaiing dish.`

A further object of my invention is. to provide a small portableelectric cooker which may be readily knocked down for transpor.

tat'on and as readily set up foruse.

further object of my invention is to pro# vide a device as mentioned incombination with a case particularly adapted to receive the same when inknocked down position to facilitate carrying the same.

Other objects will appear hereinafter.

With these objects in view my invention consists generally in a bodyportion comprising a double walled bottom and double walled sides, ,openat the top and provided with means for supporting a cooking utensilthereon, a non-conducting support within said body, a conductor thereonadapted'to be heatedto incandescence and meansfor connecting saidconductor to a Source of electric supply.

- My invention further consists in a device as mentioned furthercharacterized by a screen or baiile arranged beneath the nonconductingsupport above mentioned.

M y invention further consists in a device as mentioned in combinationwith a plurality of detachable supporting legs.

My invention further consists in a device as mentioned comprising thebody and detachable legs in combination with a casing adapted to receivesaid body portion, a closure for said casing provided with a chamber toreceive the detachable legs and a closure for said chamber.

My invention further' consists in various details of construction andarrangement of parts all as will be fully described hereinafter andparticularly pointed lout in the claims.

My invention will be more readily understood by reference to theaccompanying drawings formin a part of this specification and in whicFigure is a plan view of the device with the support for the cookingutensil removed, Fig. 2 is a vertical transverse section onsubstantially the line m-- of Fig. l, Fig. 3

is a detail perspective view of one of the legs and the adjacent portionof the body illustrating the manner of connecting the legs to the body,Fig. 4i is a detail section illustrating a modified form of theconnection to the source of electric supply, Fig'. 5 is adetailhorizontal section on substantially the line y-g/ of Fig. 2illustrating a further modification in the manner of connecting the bodyortion with the source of electric supply, 41g. 6 is a perspective viewof the case or container with a portion of the cover broken away toillustrate the construction, and Fig. 7 is a vertical transverse sectionof the same on substantially the line z-z of Fig. 6.

Referring now t the drawings A indicates the body of t e device, B thedetachable legs and C a detachable support for the cooking utensils. Thebody A- comprises an outer 4cylindrical wall 1 formed preferably ofsheet metal, an inner wall 2 spaced therefrom as hereinafter described,and a bottom .3. The cylindrical wall l is provided at its upper edgewith an outwardly extending annular flange 4 and at its lower edge withan inwardly extending. annular flange vupon which 'the bottom 3 and thelower edge of the wall 2 rest. The walls l and 2 are spaced apart by acorrugated cylindrical member 6 formed of sheet metal, referably zincand. faced with a layer 7 o asbestos.

6 is provided with a series of perforations 8 which admit air betweenthe walls land 2 andthe corrugations o f the members 6. The passage waysformed by the-corrugations of the members 6 are Iopen at theto so that acurrent of cold air may pass at times between the walls 1 and 2preventing the' side walls from becoming over heated. The bottom 3 isformed of a pair of disks 9 separated by a corrugated member 10 facedwith asbestos l1 in a manner similar-to the member 6. f

12 .indicates an annular member adapted to receive the fiange 4 tosupport the body A andequipped with a downwardly extending flange 13 towhichthe legs B ,are detachably secured. To this end the iiange 13 isformed with sockets 14, preferably dove tailed and `upwardly taperedinto which similarly formed portions 15 on the upper end of the legs areadapt'edto fit, The legs B may be ofan'y desired shape orconfigurationiand at the upper end are formed with flanges 16 adapted toit against he 'inner faces ofthe iangesl?, on the member 12 and uponwhich .theortions l5 are formed. The lower ends' ofthe legs are bracedby a member b consi's'ting'A of three radial arms ,the ends of which fitin sockets b formed in the lower portions of thelegs. The support C maybe Ofanyv desired form to support a cooking utensil or bread fortoasting, and the like, but in Athe drawings I have illustrated theusual form' of spider as commonly used upon gas and lvapor stoves.

Fixed to the bottom 3 and extending upwardly therefrom are a pluralityof osts 17 to thupper ends of'whlch is secure a mica disk 18. The'disk18 is of less diameter than the inner wall of the bodyportion leavinganl annular space 19-between the edge thereof and said wall and isformed with a central aperture 20. A conductor 21 is arranged upon thenonconductingfmica disk 18. This is preferably in the form of a singlestrip of flat conducting material arranged in the manner shown clearlyFig. 1, that is woven through an outer and aninner annular series ofperforations 22 and 23 respectively so that Y the larger portion of theconductor lies upon theupper fave of the disk in radially disposed laps24 connected at their outer and inner ends by the short portions 25 and26 respectively the latter lying beneath the'disk. By this arrangementonly-asmall portion of the conductor lies beneath the surface of thedisk 18 and what heat is radiated there from passes Aupwardly throughthecent'ral aperture 20. A pair of blocks 27 and 28 of nonconductingmaterial are secured to the inner and outer faces respectively of thebody l and connected by insulating sleeves 29 in which the terminals 30of the conductor v 21 are-arranged. This ortion of the device will bemore fullydescribed hereinafter.

Arranged between the disk 18 and the botatom-3, and spaced from the sameis a mica disk 31 which is of substantially the lsame vdiameter as the.inner wall 2 of the body and supported upon a ring 32 in turn supportedby a plurality of inwardly extending ears 33 preferably formed upon themembers 34 secured to and depending from the ring 12. By thisconstruction very little heat is radiated to the bottom 3` and onaccount of the constructionv of the latter this heat is not conducted tothe outer face thereof.

A cable 35, forming a source of electric supply, is preferably connectedto one of the detachable legs B as indicatedV at 36 in Figs.

1 and 2, but it is not essential to my inventionthat the cable should-be permanently connected to theleg as it may be detachably connected bymeans of the slipplugs 37 illusindicated in Fig. 4 and these conductorsare' preferably provided withthe plugsl -38 as above described.

In Fig. 5 I have illustrated a modied form in -Which the lterminals. -30extend throughvthe -sleeves'29 and are. provided at their outer endswith binding screws 40 to which the ends of theconductors may besecured,- the cable l35v passing through an aperture 41 in the leg. Y

42 indicatesa case for Athe device when in knocked down position. vThis.comprises a cylindrical member provided with a top or closure' 43 havinga depending annular flange 44, said flange and the upper portion of thebody 42 being provided with a bayonet joint 45 for securing the closurein position. The top or closure 43 is provided on its inner face withadepending chamber 46 adapted to receive the detached legs B andequipped a sliding closure 49 mounted in guides 50 fixed to the upperface of the top 43.

51 indicate loops fixed to the casing 1 to which a carryin strap may besecured.

The body Al ts snugly inthe bottom'of the case 42 beneath the chamber 46and the whole forms a compact device for carrying.

When the device is set up for use and the current turned on, theconductor 21 is heated to incandescence.v On account of the air at thespace 19 being relatively cool to that at the center of thedevice acurrent of air passes downwardly through the space 19, between the micadisks 18 and 3l and upwardly through -thejaperture 20 thus concen-."trating the heat at the center. This, to'- v upon the upper' edge ofsaid sidewalls, a lsheetof conconducting material supported gether withthe construction of the vouter Walls and bottom of the body ashereinbefore described maintains the body relatively (gangerol beingburned or without discom- Having described my invention, I claim: 1. Inanelectric cook stove, a bodycomprising outer and inner side wallsspaced apart and a double walled bottom, said body being open at thetop, a support resting withinv said body intermediate the top and bottomthereof, a conductor :secured to said .sheetand 'adapted 'to' be heatedto incandescence, and means for connecting said conductorto, a source ofelectric supply, substantially as-described. v

2. In an electric cook stove, a body comprising a bottom and cylindricalside walls and open at the top, a sheet of noncondu'cting materialsupported within said body in-l termediate the top and bottom and spacedfrom said side walls, said sheet being provided with a single centralaperture and a conductor secured to said sheet, the major portionresting on the upper face thereof and a minor portion on the under face,sub? stantially as described.

3. In an electric cook stove, a body comprising a bottom and side walls,a sheet of nonconducting material supported within said bodyintermediatethe top and bottom the outer edge of said sheet an said'side walls and said sheet being provided with a central aperture, and aconductor arranged kupon said sheet, substantially as described.

4. In an electric cook stove, a body comprising double spaced side wallsand a double walled bottom, posts fixed tovsaid bottom" and extendingupwardly therefrom, a disk of nonconducting material supported by saidposts, a conductor arranged upon said disk and a second disk of largerdiameter than the?"l first said disk and supported in said body-intermediate the first said disk andl said bottom, substantially asldescribed.

5. Ina device of the class described, a body comprising inner and outerwalls, spaced apart, a spacing member for said walls formed ofcorrugated metal faced with asbestos and a conductor supported withinsaid body adapted to be heated to incandescence, substantially asdescribed.

6. In a device of the class described, in'

ner and outer side walls, a corrugated member spacing said walls apart,the corrugations thereof being vertically disposed, there beingperforations forming a communica.

tion with the lower ends of said corrugations, the upper ends of saidcorrugatlons 1being'ifspem'ed to the atmosphere and a bottom forx saidbody, and a heat lgenerating device within said body, substantially .asdei scribed.

cool and easy to handle at all times without .i

Y. In a device of the class described, a

body comprising a 'cylindrical outer wall provided 'with -an outwardlyextending anfnular flange at'its upperedge and an ini wardly extendingannular flange' at itslower edge, a cylindrical inner wallfof`V lessdiameter resting upon lthe last mentioned flange, a bottom also restingupon said last mentionedv flange, a corrugated member arranged betweensaid inner and outer cylindrical walls spacing the same apart,'the cor-,rugations thereof extending substantially vertically and said inwardlyextending annular flange being provided with perforations formingcorrugati'ons with the lower ends of said corrugations, and a heat gen-4eratingin device within said body, substantially as escribed.

8. In an electric heater, a body portion comprising a cylindrical sidewalland a bottom',S said body being open at the top, supports eX-Atending upwardly fromsaid bottom, a disk.V

of insulatingmaterial arranged upon said supports, the-periphery of saiddisk being spaced from said s1de wall andsaid disk be- 'ing providedwith a central aperture, a conductor arranged-.upon saiddisk, inwardlyextending ears arranged in a plane below said disk and above said bottomand a mica periphery substantially in engagement with said side wall,substantially as described.

9. Ina device of the class described, a body comprising side walls and abottom, a. support within said body, a conductor arranged upon saidsupport, a pair of terminals xed in said side walls and insulatedtherefrom, said conductor bein connected with said terminals and meansgor connecting a source of electric supply to said terminals,substantially as described.

10. In a device of theolass described, a body portion and conductorarranged Within said body ortion, terminals for said conductor fixed) inthe side walls of saidl body, detachable legs for said body, means forconnectin a source of-electric supply to one of said egsand a detachableconnecition between said legs andsaid terminals,

substantially as'described.

11. In a device ofthe class described, a

-bbdy portion and a heating chamber within said body portion, aconductor adjacent said heatin chamber, .terminals for said conductorXed in the side walls of said body, detachable legs for saidbody, meansfor connecting a, source of electric supply to one of said legs and adetachable connection vbetween said legs and said terminals,substantially as descrlbed.

disk resting upon said ears and havingfits 12. In an electric cooker, abody compris- 10 the lowermost disk and the receptacle botof saidbody-and the lowermost disk being extended to abut'the surrounding wallsof said bodythe arrangement providing air spaces between the two disks,and between V`to11,'and a conductor upon said upper disk,

substantially as described..

In testimony whereof I have signed my' name to this specification in thepresence of twosubseribing Witnesses. x

MARTIN L. KEAGY.

Witnesses:

v JOSEPH A. PINE, E. H. ECKERT.

